/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.validator.defaultValidators;

import java.util.regex.*;
import ch.trackedbean.validator.engine.*;

/**
 * Validator for {@link Regex}.<br>
 * 
 * @author M. Hautle
 */
public class RegexValidator extends AbstractValidator {
	/** The compiled regex expression. */
	private Pattern pattern;

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void init(Configuration cfg) {
		pattern = Pattern.compile(cfg.getString(Regex.ATTR_VALUE, ""), cfg.getInt(Regex.ATTR_FLAGS, 0));
		error = new ErrorDescription(cfg.getString(Regex.ATTR_MESSAGE, Range.DEFAULT_MESSAGE));
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected boolean isValid(Object value) {
		if (!(value instanceof String))
			return true;
		return pattern.matcher((String) value).matches();
	}
}
